Key result
Electrical AV junction ablation for Mahaim fiber tachycardia resulted in complete heart block after 18 months, suggesting permanent pacemaker implantation is mandatory.
Late development of complete heart block over Mahaim fibers can occur after AV junction ablation, suggesting permanent pacemaker implantation is mandatory in these patients.
Late AV block may occur after AV junction ablation for Mahaim fibers; this case leaves open whether permanent pacing is mandatory.
A patient suffering from so called "Mahaim fiber" tachycardia is presented who developed complete heart block over Mahaim fibers after 18 months of AV junction ablation. Antegrade conduction along the Mahaim fiber was intact immediately after the procedure. This finding has not been previously described and suggests that permanent pacemaker implantation is mandatory in such patients.
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Kritharides et al. (1992) studied this question. Electrical AV junction ablation for Mahaim fiber tachycardia resulted in complete heart block after 18 months, suggesting permanent pacemaker implantation is mandatory.
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